Android Brightness Control APK Development

I need a simple Android APK that will automatically adjust the brightness to 80% and run in the background.

Key Requirements:
- Automatically revert brightness to 80% if changed manually
- Run as a service after device reboot
- App icon should be visible in the app drawer

Ideal skills and experience:
- Android app development expertise
- Experience with background services and brightness control
- Familiarity with device reboot handling

The logo is available. The APK Name should be "BrightGuard"